Miscanthus x giganteus culture on soils highly contaminated by metals: Modelling leaf decomposition impact on metal mobility and bioavailability in the soil–plant system

Souki, Karim Suhail Al; Liné, Clarisse; Louvel, Brice; Waterlot, Christophe; Douay, Francis; Pourrut, Bertrand

doi:10.1016/j.ecoenv.2020.110654

Cited by 11 publications

(17 citation statements)

References 53 publications

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“…Currently, the main problems related to the contaminated leaves of miscanthus at the soil surface are the presence of bioavailable metals and the very low degradability rate of leaves due to the presence of silica and lignin. On the other hand, it was shown that after senescence, Cd and Pb CaCl 2 -extractable concentrations increased through leaf decomposition [23]. Finally, it is worth mentioning the high average concentration of Ca in the leaves of miscanthus from microcosm and field experiments (up to 7300 mg kg −1 DW and 9000 mg kg −1 , respectively, depending on the replicates (n = 18) and thus their potential interest in organic synthesis.…”

Section: Concentration Of Metals In the Aerial Parts Of Miscanthus × Giganteusmentioning

confidence: 93%

“…Consequently, for best practices in our phytomanagement, we decided to harvest the stems of miscanthus after the senescent period and to leave the leaves of miscanthus on the soil. Recently, impact of leaf decomposition and the consequences for metal behavior and the succeeding culture was studied [23]. If no persistent impacts of the leaf litter on the soil-miscanthus system was highlighted, the authors showed a significant increase of Cd and Pb CaCl 2 -extractable concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Toward a New Way for the Valorization of Miscanthus Biomass Produced on Metal-Contaminated Soils Part 1: Mesocosm and Field Experiments

et al. 2020

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The effects of P-fertilizers (mono- and di-calcium phosphates) on the bioavailability of metals and nutrients in leaves and stems of Miscanthus × giganteus were studied in mesocosm and field experiments in order to propose a new way for the valorization of miscanthus biomass. The concentration of potentially toxic elements was generally higher in stems than in leaves. Although P-fertilizers were added to contaminated soils under sustainable conditions (from 0.022% to 0.026% w/w), the average of leaf and stem biomass generally increased in the presence of P-fertilizers due to the changes in the speciation of phosphorus. Leaves of the investigated miscanthus may be of great interest as a catalyst in organic chemistry, since the Ca concentration was up to 9000 mg kg−1 DW. Stems represent a potential biomass that can be used as renewable resource of Lewis acids, currently used in organic syntheses (the sum of Zn, Cu, Mn, Fe, Mg, Si and Al was near 1000 mg kg−1 DW). The percentage of Cd and Pb in leaves and stems of miscanthus did not significantly change with P-fertilizers. Depending on the mesocosm and field experiments, it ranged from 0.004% to 0.016% and from 0.009% and 0.034% for Cd in leaves and stems, respectively, and from 0.004% to 0.015% and from 0.009% and 0.033% for Pb in leaves and stems, respectively.

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Section: Concentration Of Metals In the Aerial Parts Of Miscanthus × Giganteusmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Toward a New Way for the Valorization of Miscanthus Biomass Produced on Metal-Contaminated Soils Part 1: Mesocosm and Field Experiments

et al. 2020

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“…Another reason might be the plant root exudates constituents (carbohydrates, proteins and amino acids) which are regarded as the main source of organic carbon [30,33,41] ( Figure 8, ρ: 0.42, Table S2). Moreover, the return of the leaf residues and their subsequent incorporation into the soil (mainly the 0-10 cm layer) could be also a potential source of the significant SOC augmentation [42]. Another factor that could be taken into consideration, is the increase in the soil microbial biomass [43].…”

Section: Impact On Soil Physico-chemical Parametersmentioning

confidence: 99%

“…Some of the factors standing behind the variation between the activities could be the vegetation type (miscanthus in our case) that plays a decisive role in rendering the soil a suitable environment for the microbial communities and activities to prosper [59][60][61]. Miscanthus derived carbon could be the main driving component in the bacterial activity stimulation (Figure 8, ρ: 0.98 and 0.92 corresponding to BR and FDHA respectively, Table S2), via the easily metabolizable root exudates (sugars, amino acids, fatty acids, growth factors and nucleotides) or the easily available organic compounds of the incorporated miscanthus leaves [42]. These supplied elements enhance the enzymatic synthesis and simultaneously microbial development [62].…”

Section: Impact On Soil Biological Parametersmentioning

confidence: 99%

Enhanced Carbon Sequestration in Marginal Land Upon Shift towards Perennial C4Miscanthus × giganteus: A Case Study in North-Western Czechia

et al. 2021

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Bioenergy crops such as Miscanthus x giganteus are foreseeable as an alternative source to replace fossil fuel and reduce greenhouse gas emissions. They are also assessed as an environment-friendly solution for polluted, marginal and low-quality agricultural soils. Several studies had been launched on soil organic carbon sequestration potentials of miscanthus culture along with its impacts on restoring soil functionality, most of which focus on the long-term basis of the plant’s cultivation. Nevertheless, information concerning the short term impacts as well as the situation in Czechia is still scarce. In this context, a field experiment was launched in 2017 in a poor-quality agricultural land in the city of Chomutov (North-Western Czechia) to compare the impacts of the perennial C4 miscanthus with an annual C3 forage crop (wheat) on the soil carbon stocks as well as enhancing its functionality. Results through the 0–30 cm soil profile examination showed that miscanthus plants played a role in improving the studied soil physico-chemical (bulk density and soil organic carbon concentrations) and biological (Phospholipid fatty acids stress indicator, basal respiration and fluorescein diacetate hydrolytic activity) parameters. The naturally occurring δ13C concentrations were used to evaluate the direct plant contribution to the total soil organic carbon (SOC) stocks and revealed considerable miscanthus contribution all over the detected soil layers (1.98 ± 0.21 Mg C. ha−1 yr−1) after only 3 growing seasons. It is thus suggested that the C4 perennial miscanthus possess remarkable prospects for SOC sequestration and restoring degraded lands.

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“…Depending on the clone, M.xg and M. sacchariflorus may have high lignin content, making them suitable for thermochemical conversion processes. Positive effects of Miscanthus on contaminated lands include the increase of: 1) soil microbial biomass and activity (Al Souki et al, 2017), 2) density and diversity of soil macroinvertebrates (Hedde et al, 2013), 3) carbon sequestration (Christensen et al, 2016), and 4) long-term TE phytostabilization (Pavel et al, 2014) with few TE inputs from senescent leaves incorporation into the soils (Al Souki et al, 2020). An additional benefit of Miscanthus is the reduction of soil disturbance, as no tillage is needed for its implementation and maintenance (Nsanganwimana et al, 2014).…”

Section: Perennial Grass Cropsmentioning

confidence: 99%

Phytomanagement of Metal(loid)-Contaminated Soils: Options, Efficiency and Value

Moreira

Pereira

Mench

et al. 2021

Front. Environ. Sci.

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The growing loss of soil functionality due to contamination by metal(loid)s, alone or in combination with organic pollutants, is a global environmental issue that entails major risks to ecosystems and human health. Consequently, the management and restructuring of large metal(loid)-polluted areas through sustainable nature-based solutions is currently a priority in research programs and legislation worldwide. Over the last few years, phytomanagement has emerged as a promising phytotechnology, focused on the use of plants and associated microorganisms, together with ad hoc site management practices, for an economically viable and ecologically sustainable recovery of contaminated sites. It promotes simultaneously the recovery of soil ecological functions and the decrease of pollutant linkages, while providing economic revenues, e.g. by producing non-food crops for biomass-processing technologies (biofuel and bioenergy sector, ecomaterials, biosourced-chemistry, etc.), thus contributing to the international demand for sustainable and renewable sources of energy and raw materials for the bioeconomy. Potential environmental benefits also include the provision of valuable ecosystem services such as water drainage management, soil erosion deterrence, C sequestration, regulation of nutrient cycles, xenobiotic biodegradation, and metal(loid) stabilization. Phytomanagement relies on the proper selection of (i) plants and (ii) microbial inoculants with the capacity to behave as powerful plant allies, e.g., PGPB: plant growth-promoting bacteria and AMF: arbuscular mycorrhizal fungi. This review gives an up-to-date overview of the main annual, perennial, and woody crops, as well as the most adequate cropping systems, presently used to phytomanage metal(loid)-contaminated soils, and the relevant products and ecosystems services provided by the various phytomanagement options. Suitable bioaugmentation practices with PGPB and AMF are also discussed. Furthermore, we identify the potential interest of phytomanagement for stakeholders and end-users and highlight future opportunities boosted by an effective engagement between environmental protection and economic development. We conclude by presenting the legal and regulatory framework of soil remediation and by discussing prospects for phytotechnologies applications in the future.

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Miscanthus x giganteus culture on soils highly contaminated by metals: Modelling leaf decomposition impact on metal mobility and bioavailability in the soil–plant system

Cited by 11 publications

References 53 publications

Toward a New Way for the Valorization of Miscanthus Biomass Produced on Metal-Contaminated Soils Part 1: Mesocosm and Field Experiments

Toward a New Way for the Valorization of Miscanthus Biomass Produced on Metal-Contaminated Soils Part 1: Mesocosm and Field Experiments

Enhanced Carbon Sequestration in Marginal Land Upon Shift towards Perennial C4Miscanthus × giganteus: A Case Study in North-Western Czechia

Phytomanagement of Metal(loid)-Contaminated Soils: Options, Efficiency and Value

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